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| author | Ulrich Drepper <drepper@redhat.com> | 2010-04-03 23:51:40 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2010-04-03 23:51:40 -0700 |
| commit | 1a81139728494810f65aaa0d0c538ff8c2783dd5 (patch) | |
| tree | f22dff8150b303bbb6f0d999a81c0fd9c539ab04 /sysdeps | |
| parent | 3fedf0feb75457f7098a0119ca4203ff449546b6 (diff) | |
| download | glibc-1a81139728494810f65aaa0d0c538ff8c2783dd5.tar.gz glibc-1a81139728494810f65aaa0d0c538ff8c2783dd5.tar.xz glibc-1a81139728494810f65aaa0d0c538ff8c2783dd5.zip | |
Handle unnecessary padding in getdents64.
The getdents64 syscall adds on 32-but platforms padding which isn't needed and not included in the userlevel data structure definition. We have to avoid copying those padding bytes in the readdir64_r function.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/readdir_r.c | 14 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/readdir64_r.c | 3 |
2 files changed, 14 insertions, 3 deletions
diff --git a/sysdeps/unix/readdir_r.c b/sysdeps/unix/readdir_r.c index f84709e737..93727912c1 100644 --- a/sysdeps/unix/readdir_r.c +++ b/sysdeps/unix/readdir_r.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991,92,93,94,95,96,97,98,99,2000,02 +/* Copyright (C) 1991,92,93,94,95,96,97,98,99,2000,02,10 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -113,7 +113,17 @@ __READDIR_R (DIR *dirp, DIRENT_TYPE *entry, DIRENT_TYPE **result) while (dp->d_ino == 0); if (dp != NULL) - *result = memcpy (entry, dp, reclen); + { +#ifdef GETDENTS_64BIT_ALIGNED + /* The d_reclen value might include padding which is not part of + the DIRENT_TYPE data structure. */ + reclen = MIN (reclen, sizeof (DIRENT_TYPE)); +#endif + *result = memcpy (entry, dp, reclen); +#ifdef GETDENTS_64BIT_ALIGNED + entry->d_reclen = reclen; +#endif + } else *result = NULL; diff --git a/sysdeps/unix/sysv/linux/i386/readdir64_r.c b/sysdeps/unix/sysv/linux/i386/readdir64_r.c index c6da57b75e..f96f16a6f2 100644 --- a/sysdeps/unix/sysv/linux/i386/readdir64_r.c +++ b/sysdeps/unix/sysv/linux/i386/readdir64_r.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2000, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2000, 2004, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -19,6 +19,7 @@ #define __READDIR_R __readdir64_r #define __GETDENTS __getdents64 #define DIRENT_TYPE struct dirent64 +#define GETDENTS_64BIT_ALIGNED 1 #include <sysdeps/unix/readdir_r.c> |